The event in question is https://app.element.io/#/room/!RbKRuLTvHIhArQcvjr:matrix.org/$1613561441289661rpDpF:matrix.org?via=matrix.org&via=vector.modular.im&via=t2l.io

The client that sent the event (element desktop) and my dekstop hydrogen running alongside did not get the event from sync.

On element desktop the event was black (e.g. sent) but stuck to the bottom of the room, and on hydrogen I check the storage and it showed that there was no limited sync for that room around those messages, and there is no trace of that event anywhere.

When opening my phone hydrogen an hour or so later, the event was synced down to it in the correct order.

At least T3chguy and Ryan did receive the event in the correct order.